German aftermarket firm Kelleners Sport is one of the first official tuners to get its hands on the new BMW 1-Series M Coupe and offer a complete conversion. Named KS1-S, the modified 1 M Coupe’s turbocharged straight-six now delivers 410-horses, or a good 20% more than the standard car, and just 10HP short of the E92 M3, while torque is increased from 450 to 550 Nm or 405.7 lb-ft.

As a result, the power to weight ratio drops from 4.4kg per HP in the stock model to 3.8 kg per hp in the KS-1 S.

Visually, the KS1-S differs from the standard 1 M Coupe thanks to new aerodynamic parts designed to minimize drag and increase downforce at high speeds, as well as the quad 83 mm exhaust pipes.

Kellener’s 1 M Coupe now rides on new 20-inch alloy wheels shod in tires size 245/30 at the front and 265/30 at the rear.

The company also worked on the suspension settings and added an adjustable coil-over system, which gives the driver the opportunity to adjust both rebound and compression independently.

Changes were also made also in the interior with two-tone black and white perforated leather and alcantara covering the dashboard, door panels and front and rear seats.